You spend €1,500 per rep on training. 80% is gone in 30 days. Here's why, and what changes.

It's the number every HR director knows but few lay out in front of the leadership team: of the €200,000 invested each year in sales training for a team of 100, roughly €160,000 of "skills capital" evaporates within a month. Not because the provider is weak. Not because your reps lack motivation. Because the training format ignores everything we've known about adult learning for a century.

The forgetting curve: what your training plan doesn't account for

Ebbinghaus's work on memory has been documented since 1885 and replicated since on sales data (Murre & Dros, PLOS ONE 2015): without active reinforcement in the days following a training session, 80% of what was learned fades within 30 days. Your September seminar is a parenthesis. By November, almost nothing is left.

This isn't your reps dragging their feet. It's neurology. The brain only stores for the long term what it uses and repeats. A skill taught two days a year, with no structured practice, never becomes a reflex. It stays knowledge: fragile, contextual, easy to forget.

A company with 100 sales reps invests on average €200,000 a year in in-person training. If 80% of that investment evaporates within a month, that's €160,000 of skills capital disappearing every year. With no one measuring it.

b-flower report, The Sales Performance Equation, 2026

The problem you have with your CFO: justifying the ROI

As the HR director, you're on the front line when the CFO reviews training budgets. The question is always the same: what's the return on that €200,000? The usual answers (satisfaction surveys, completion rates, qualitative feedback from managers) don't survive long against a financial dashboard.

The problem is structural: conventional training tools don't produce the data that answers that question. You know how much you spent. You don't know how many extra deals that spend generated. What's missing is a direct measure of how sales behaviors change, correlated with the practice reps get.

What Marvin.ai changes in measuring training ROI

Marvin.ai isn't an LMS. It's a continuous practice platform that produces behavioral data at every session. Each simulation generates precise metrics:

• Discovery score: is the rep asking the right qualification questions?
• Objection handling quality: reframing before answering, relevance of the arguments.
• Week-over-week progress on the targeted skills.
• Correlation with field results: do reps whose simulation score improves convert better?

For the first time, this data lets you answer the CFO with facts: here are the skills that improved, here are the reps who raised their conversion rate after 6 weeks of practice, here's the link between training investment and the change in revenue.

The hybrid model: seminar plus continuous practice

Marvin.ai doesn't replace your in-person training. It complements it. The seminar builds cohesion, conveys the vision, sets the momentum. Marvin anchors skills over time, through weekly practice, immediate feedback, repetition until it's automatic. The hybrid is the point: in-person for cohesion and vision, the simulator for technical skill.